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Analog Devices Inc./Maxim Integrated MAX32666GWPBT+
- Part No.:
- MAX32666GWPBT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 109-WFBGA, WLBGA
- Datasheet:
-
MAX32666GWPBT+.pdf
- Description:
- IC MCU 32BIT 1MB FLASH 109WLP
- Quantity:
- Payment:
- Shipping:
Inventory:3,770
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Product details
Overview
MAX32666GWPBT+ from Analog Devices is a low-power Arm Cortex-M4 with FPU microcontroller featuring integrated Bluetooth 5 LE radio, Trust Protection Unit (TPU), 1MB dual-bank flash, 560KB SRAM, and SIMO SMPS for coin-cell operation-designed for secure, battery-constrained wearables and hearables.
For engineers reviewing the MAX32666GWPBT+ datasheet, MAX32666GWPBT+ pinout, MAX32666GWPBT+ application, or MAX32666GWPBT+ equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready procurement support for medical, fitness, and telemedicine edge devices.
Technical Context
The MAX32666GWPBT+ integrates two Arm Cortex-M4 cores (CPU0 + optional CPU1), each running up to 96MHz with FPU and 16KB cache, enabling concurrent real-time signal processing and BLE stack execution. Its memory architecture supports SPIX execute-in-place from external flash via SPIXF and SPIXR interfaces.
It implements a full Bluetooth 5 LE radio with configurable data rates (125kbps–2Mbps), -95dBm Rx sensitivity, +4.5dBm Tx output, on-chip matching for single-ended antenna, and hardware-accelerated security including AES/SHA-2/DES/3DES, TRNG, MAA, and SCPBL-secured boot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, up to 96MHz - enables efficient floating-point math for sensor fusion and audio DSP in wearables. |
| Memory | 1MB dual-bank flash (2×512KB) + 560KB SRAM - supports seamless OTA updates and large firmware/algorithm storage. |
| BLE Radio | Bluetooth 5 LE with 2Mbps throughput & long-range (125/500kbps) - extends wireless range and doubles data rate vs. BLE 4.2. |
| Power Efficiency | 27.3μA/MHz at 3.3V executing from cache - minimizes active power draw for multi-day battery life on coin cells. |
| Security | Trust Protection Unit (TPU) with MAA, AES/SHA-2/DES/3DES accelerators, TRNG, SCPBL, and Secure Boot - meets HIPAA/FDA-grade firmware integrity requirements. |
| Package | 109-bump WLP, 0.35mm pitch - ultra-compact footprint ideal for space-constrained hearables and medical patches. |
| ADC | 8-input, 10-bit delta-sigma ADC @ 7.8ksps - suitable for analog sensor monitoring (ECG, temperature, motion). |
Pinout & Package
MAX32666GWPBT+ is housed in a 109-bump Wafer-Level Package (WLP) with 0.35mm pitch, optimized for minimal PCB area in wearable form factors. Pin assignments follow the official MAX32666 109 WLP configuration per Analog Devices' datasheet Rev 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Analog Power Supply | 1.71–1.89V supply for ADC, comparators, and analog peripherals; requires dedicated low-noise decoupling. |
| VREGI | Battery Input | 2.0–3.6V primary input for SIMO SMPS; enables direct coin-cell (CR2032) or Li-ion battery connection. |
| VCOREA / VCOREB | Digital Core Supplies | 1.1–1.21V supplies for CPU0 and CPU1 domains; tightly regulated for low-voltage, high-efficiency operation. |
| ANT | RF Antenna Port | Single-ended 50Ω RF output with on-chip matching; connects directly to PCB trace or chip antenna without external balun. |
| RSTN | Active-Low Reset | Asynchronous reset input; asserted when any monitored supply falls below POR threshold (e.g., VCOREA < 0.63V). |
| SWDIO / SWCLK | Debug Interface | 2-pin Serial Wire Debug interface for programming, tracing, and real-time debugging without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-CPU Architecture | Independent Arm Cortex-M4 cores (CPU0 + optional CPU1) allow separation of BLE protocol stack and application logic-reducing latency and improving determinism. |
| Secure Boot & SCPBL | Hardware-enforced Secure Bootloader (SCPBL) validates firmware signature before execution, preventing unauthorized code injection in medical or payment devices. |
| SIMO SMPS | Single-inductor, multiple-output switch-mode regulator powers all internal rails (VCOREA/B, VDDA, VDDIO) from one 2–3.6V source-eliminates need for external DC/DC converters. |
| Audio Subsystem | Integrated PDM, I2S, TDM, and PCM interfaces support up to two digital microphones and stereo audio output-enabling voice-controlled hearables without codec ICs. |
| Memory Scalability | SPIX interfaces (SPIXF/SPIXR) enable external flash code execution and SRAM expansion-extending effective memory beyond on-die 560KB without performance penalty. |
Applications
| Medical Wearables | Fitness Trackers |
|---|---|
Use Scenario: Continuous ECG and SpO₂ monitoring in patch-style clinical devices worn for 7+ days. IC Role / Device Role / Timing Role: Primary system-on-chip handling analog front-end sampling, real-time arrhythmia detection, encrypted BLE transmission, and ultra-low-power sleep scheduling. Use Value: Dual-core isolation ensures BLE advertising remains responsive while CPU1 runs ML inference; SIMO SMPS enables CR2032 operation with >120hr runtime. |
Use Scenario: Multi-sport wristband with optical HR, 6-DOF IMU, and personalized coaching feedback. IC Role / Device Role / Timing Role: Central controller managing sensor fusion, activity classification, local display control, and synchronized BLE sync to smartphone apps. Use Value: 560KB SRAM buffers raw sensor streams; 1MB dual-bank flash allows background OTA updates without interrupting workout sessions. |
| Hearables | Telemedicine Sensors |
Use Scenario: True wireless stereo (TWS) earbuds with voice assistant, ANC, and touch control. IC Role / Device Role / Timing Role: Audio DSP + BLE SoC performing PDM microphone preprocessing, beamforming, and low-latency A2DP/LE Audio streaming. Use Value: Integrated PDM/I2S/TDM eliminates external audio codec; 27.3μA/MHz active power extends talk time to >4hrs on 45mAh battery. |
Use Scenario: Disposable remote patient monitoring patch transmitting vital signs to cloud via BLE gateway. IC Role / Device Role / Timing Role: Secure edge node performing sensor acquisition, AES-encrypted payload packaging, and scheduled BLE broadcast to hub. Use Value: TPU-accelerated ECDSA signing and SHA-2 hashing meet HIPAA-compliant data integrity requirements; BACKUP mode draws only 1.2–8.6μA with RTC active. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power BLE microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| nRF52840 DK | No integrated SIMO SMPS; requires external DC/DC; lacks TPU and MAA hardware acceleration; 1MB flash but only 256KB RAM. | Better suited for USB-powered dev kits than coin-cell wearables; weaker cryptographic throughput for secure boot. | Choose when USB HID prototyping or Mesh networking is prioritized over battery life and hardware root-of-trust. |
| CC2642R1F | Single Cortex-M4F core (no dual-CPU option); 352KB RAM; no integrated SIMO regulator; lower Tx power (+0dBm vs. +4.5dBm). | Limited memory headroom for complex sensor fusion; less suitable for standalone hearable audio processing. | Prefer for cost-sensitive industrial sensor nodes where BLE range and dual-core concurrency are non-critical. |
Compared with nRF52840 DK and CC2642R1F, MAX32666GWPBT+ uniquely combines coin-cell–optimized power architecture, dual-core deterministic processing, and production-grade hardware security-making it the only option qualified for FDA-submission wearable platforms requiring both longevity and cryptographic assurance.
Availability
MAX32666GWPBT+ is available at Aetrix Electronics and suitable for medical wearables, fitness trackers, and telemedicine sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing traceability.
Supply support for MAX32666GWPBT+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX32666GWPBT+ belongs to Analog Devices' DARWIN UB microcontroller family, engineered specifically for ultra-low-power, secure, and computationally intensive wearable and hearable applications demanding Bluetooth 5 connectivity and hardware-rooted trust.
FAQ
What is the maximum operating frequency of the MAX32666GWPBT+ CPU?
The MAX32666GWPBT+ features an Arm Cortex-M4 with FPU core rated for up to 96MHz operation. This frequency is fully supported across the industrial temperature range (-40°C to +85°C) and under all valid supply conditions (VCOREA/VCOREB = 1.1–1.21V). The MAX32666GWPBT+ achieves 27.3μA/MHz efficiency at this speed when executing from cache, confirming its suitability for sustained high-throughput sensor processing in battery-powered designs.
Does the MAX32666GWPBT+ support over-the-air (OTA) firmware updates?
Yes, the MAX32666GWPBT+ supports seamless OTA updates using its dual-bank 1MB flash architecture (2 × 512KB). While one bank executes active firmware, the other receives and validates new images-enabling zero-downtime upgrades critical for deployed medical and fitness devices. The Secure Bootloader (SCPBL) verifies digital signatures before committing updates, ensuring only authenticated firmware runs on the MAX32666GWPBT+.
What antenna interface does the MAX32666GWPBT+ provide for Bluetooth 5?
The MAX32666GWPBT+ provides a single-ended 50Ω ANT pin with integrated RF matching circuitry, eliminating the need for external baluns or matching networks. It supports direct connection to PCB trace antennas, chip antennas, or IPEX connectors. The radio delivers -95dBm Rx sensitivity and +4.5dBm programmable Tx output, enabling reliable 2Mbps BLE communication at extended range-verified per Bluetooth SIG PHY test specifications.
How does the MAX32666GWPBT+ manage power for coin-cell operation?
The MAX32666GWPBT+ integrates a Single-Inductor Multiple-Output (SIMO) switch-mode power supply that derives all internal rails (VCOREA, VCOREB, VDDA, VDDIO) from a single 2.0–3.6V VREGI input-enabling direct CR2032 or LiPo battery connection. In BACKUP mode with RTC enabled and minimal SRAM retention, it draws just 1.2–8.6μA, extending shelf life and operational runtime far beyond discrete regulator solutions.
Is the MAX32666GWPBT+ pin-compatible with the MAX32665GWPBT+?
Yes, the MAX32666GWPBT+ and MAX32665GWPBT+ share identical 109-bump WLP packaging, pinout, and mechanical footprint. The key functional difference is the inclusion of the Trust Protection Unit (TPU) with Modular Arithmetic Accelerator (MAA) in the MAX32666GWPBT+, which is absent in the MAX32665GWPBT+. All other peripherals, memory, BLE radio, and power features are functionally identical-allowing drop-in replacement where hardware cryptographic acceleration is required.
MAX32666GWPBT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 109-WFBGA, WLBGA
- Series:
- DARWIN
- Packaging:
- Strip
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4/M4F
- Core Size:
- 32-Bit Dual-Core
- Speed:
- 96MHz
- Connectivity:
- I2C, SPI, UART/USART, USB
- Peripherals:
- Bluetooth, Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 50
- Program Memory Size:
- 1MB (1M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 192K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 8x10b Sigma-Delta
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MAX32666GWPBT+ FAQ
1.How can I place an order for MAX32666GWPBT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32666GWPBT+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX32666GWPBT+ reliable?
The price and inventory of MAX32666GWPBT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32666GWPBT+ is usually 5 days.
3.What payment methods are accepted for MAX32666GWPBT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32666GWPBT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32666GWPBT+?
MAX32666GWPBT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32666GWPBT+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX32666GWPBT+?
For technical support, including MAX32666GWPBT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32666GWPBT+ requirements.
6.How does Aetrix verify that MAX32666GWPBT+ is sourced from the original manufacturer or authorized distributors?
All MAX32666GWPBT+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX32666GWPBT+ meets industry standards.
7.What is the process for return or replacement of MAX32666GWPBT+?
All MAX32666GWPBT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX32666GWPBT+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX32666GWPBT+ part is unused and in its original packaging.
Return procedure for MAX32666GWPBT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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